Vaisala MGP262 Multigas Probe Low CH4 and high CO2 Measurement Low Biogas Methane Measurement
- Model
- MGP262
Item specifics
- Brand
- Vaisala
- Housing Material
- Stainless Steel
- Connection
- Optional
- Fluid
- CH4, CO2
- IP Rating
- IP65
- Interface
- Mudbus or 4–20 mA
Review
Description
Vaisala MGP262 Multigas Probe
For low concentration methane and high concentration carbon dioxide measurement
Features
• Compact in situ probe with low-% CH4 and high-% CO2 measurement
• Excellent long-term stability and repeatability with proprietary infrared technology — no calibration gases needed
• Direct installation into process: no sample treatment needed
• Certified for Ex Zone 0/1
• Probe heating eliminates condensation in wet processes
• Corrosion-resistant stainless steel housing (IP66)
• Standalone probe with digital Modbus RTU over RS-485 or 3 analog outputs (4–20 mA)
• Compatible with Vaisala Insight PC software
Vaisala CARBOCAP® MGP262 Multigas Probe for Methane and Carbon Dioxide Measurement is designed for demanding in situ measurement of the offgas in the biogas upgrading process, where low concentrations of methane need to be measured reliably and with high accuracy in the presence of high concentrations of carbon dioxide. The probe belongs to the Vaisala MGP260 series product family.
Direct view to process
performance
MGP262 measures the concentrations of the main components in the offgas stream of a biogas upgrading process: methane and carbon dioxide. The methane concentration in the offgas is one of the direct indicators of the process performance. The lower the offgas methane concentration, the lower the methane loss, hence higher yield from the biogas and the smaller the environmental impact. Monitoring offgas composition reliably and accurately enables optimizing the upgrading process as well as determining the amount of greenhouse gases emitted from the process for environmental compliance purposes.
Outstanding methane measurement performance
MGP262 has been optimized for measuring methane concentrations below 5 vol-% with an accuracy of ±0.15 vol-%. Combined with a wide temperature range (-40 to +60 °C), MGP262 is ideal for a wide range of upgrading technologies and processes.
Ease of use
MGP262 is unique in being an in situ probe for demanding explosive environments. No sampling system is needed and there are no moving parts in the probe. Apart from an annual calibration check, MGP262 does not need any consumables or calibration gas cylinders, which makes its maintenance very easy.
Robust, weatherproof, and Ex-certified for Zones 0 and 1
MGP262 is internationally certified for Zone 0 inside the pipeline and Zone 1 on the outside, allowing installation in any Ex hazardous environment expected in the biogas and natural gas industry. The probe is IP66-rated and specified for ambient temperatures from -40 to +60°C for outdoor installation in harsh environments. Stainless-steel construction, hermetic sealing of optics, and encapsulated electronics provide the probe with maximum robustness and resilience to mechanical shocks, vibration, and corrosive chemicals.
Measurement Performance
Property | Methane CH4 | Carbon dioxide CO2 |
Sensor | CARBOCAP® | CARBOCAP® |
Measurement unit | Volume-% | |
Measurement range | 0–5 vol-% | 0–100 vol-% |
Accuracy at+25 °C (+77 °F) and 1013 hPa 1) 2) | 0–2 vol-%:
±0.1 vol-%CH4
2–5 vol-%:
±5% of reading | 90–100 vol-%:
±1 vol-%
0–90 vol-%:
±2 vol-% |
Repeatability 1) 2) | < ±0.1 vol-% at 1% CH4 | ±0.4 vol-% at 95 vol-% |
Temperature dependence
(typical) | Compensated:
0–2 vol-%: ±0.05%CH4
2–5 vol-%: ±0.2%CH4 | Compensated, 0–100 vol-%:±0.4 vol-% |
Uncompensated:
±0.7 % of reading / °C | Uncompensated, 0–100 vol-%: ±0.1 % of reading / °C | |
Pressure dependence
(typical) | Compensated:
0–2 vol-%: ±0.05%CH4
2–5 vol-%: ±0.1%CH4 | Compensated, 0–100vol-%: ±1 vol-%CO2 |
Uncompensated:
±0.2 % of reading / hPa | Uncompensated, 0–100vol-%: ±0.15 % of reading /hPa | |
Long-term stability | 0–2 vol-%:
±0.1 vol-%CH4 / year
2–5 vol-%:
±5% of reading / year | ±2 vol-%/year |
Start-up time 3) | 30 s | |
Warm-up time 4) | 2 min 5) | |
Response time (T90) | 90 s 6) | |
Response time with flow through adapter | 90 s at ≥ 0.5 l/min 6) (recommended: 0.5–1 l/min) | |
1) Excluding cross-references to other gases.
2) Accuracy specification at 25 °C (+77 °F) and 1013 hPa including non-linearity, calibration uncertainty, and repeatability; temperature and pressure compensated.
3) Time to first reading.
4) Time to specified accuracy.
5) At +20 °C (+68 °F) ambient temperature.
6) With standard PTFE filter.
Operating environment
Operating temperature range | -40 ... +60 °C (-40 ... +140 °F) |
Operating humidity range | 0–100 %RH |
Storage temperature range | -40 ... +60 °C (-40 ... +140 °F) |
Storage humidity range | 0–90 %RH |
Process pressure range | -500 ... +500 hPa |
Process temperature range | +0 ... +60 °C (+32 ... +140 °F) |
Process flow range | 0–20 m/s |
Compliance
Electromagnetic compatibility (EMC) | EN 61326‑1, industrial environment |
Compliance marks | CE, China RoHS, RCM |
Ex approval marks | EU (ATEX), international (IECEx),
US/CAN (cMETus), Japan (CML), UK (UKEX), Korea (KCs) |
Ex classification | Ex II 1/2 (1) G Ex eb mb [ia] IIB T3
Ga/Gb -40 °C ≤ Tamb ≤ +60 °C |
Class I, Division 2, Groups C, D; T3 |
Inputs and outputs
Operating voltage | 18–30 V DC |
Power consumption | Typical: 3 W
Maximum: 6 W |
Digital output | RS-485 (Modbus RTU) |
Analog output | 3 × 4–20 mA scalable, isolated |
Analog output load | Minimum: 0 Ω
Maximum: 500 Ω |
Analog output accuracy | ±0.2 % of full scale at 25 °C (77 °F) |
Analog output temperature dependence | 0.005 %/˚C (0.003 %/°F) full scale |
Analog input (recommended) | 1 × 4–20 mA (Ex ia) for external pressure or temperature sensor 1) |
1) The optional analog input is galvanically isolated and provides power for the connected external pressure sensor.
Mechanical specification
Weight | 3 kg (6.6 lb) |
Thread type | 1.5" male NPT |
Mechanical pressure tolerance | 20 bar(g) |
Cable lead-throughs | 1 × M16x1.5
2 × M20x1.5 |
IP rating | IP66 |
Materials | |
Probe body | AISI316L stainless steel, PPS |
Filter cap | Sintered PTFE |
Options and accessories
| Configuration cable (RS485/USB) | 257295 |
| Flow-through adapter | 258877 |
| Sintered PTFE filter (includes O-ring) | DRW249919SP |
| MGP260 Series Ex e connector set | 265897 |
| NPT 1.5" thread test plug | 257525SP |
